Type-writer.



G. W. DONNING.

TYPE WRITER.

APPLICATION FILED IEB.1,1906.

Patented Aug. 3, 1909.

5 SHEETS-SHEET 1.

"G. W. DONNING.

T E WRITER. APPLICATION FILED FEB. 1, 1906.

Patented Aug. 3, 1909.

5 SHEETS- SHEE'I' 2.

G. W. DONNING.

TYPE WRITER.

APPLIOATIOK FILED rm. 1, 1906. 929,840, Patented Aug. 3, 1909.ESHEBTS-SHEET-3.

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TYPE WRITER.

APPLICATION FILED FEB. 1, 1906.

' 9295840 Patented Aug. 3, 1909. 6 SHEETS-SHEET 4. 1' W 4/ 64 llll IHIIHIHI fiLj Qbfommu V G, W ONNING. TYPE WRITER.

ARPLICATION FILED FEB.1,1906.

293% Patented Aug. 3, 1909.

5 SHEEN-SHEET 5.

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UNI ED STA'I1 E PATENT OFFICE.

GEORGE W. DONNING, OF'STAMFORD, CONNECTICUT, ASSIGNOR TO HARRY T. AMBROSE,

' OF ORANGE, NEW JERSEY.

TYPE-WRITER.

Specification of Letters Patent. Original application filed April 261902, Serial No. 104,842. Divided and this application filed February 1,1906.

Patented Aug. 3, 1909.

Serial No. 299,022.

To all whom it may concern:

Be i known that I, GEORGE W. DONNING, a citizen of the United States,residing at Stamford, in the county of Fair-field and StateofConnecticut', have invented certain new and useful Improvements inType- 'Writers and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to Which itappertains to make and use thesame.

This invention relates to fiat-platen writing-machines, and its objectis to produce certain improvements in. the supporting or carriageportions of such mach-mes and to rovide means for permitting andeffecting me longitudinal adjustment of the part of such a machine whichmoves longitudinally under the control of suitable feed-mechanism forthe purpose of line spacing.

In the use of machines of this character it would fre'quently bedesirable to be enabled to imprint characters between the lines ofWriting determined by the feed mechanism. Such machines; too, arelargely employed for making up bills, and for Writing in blanks ofvarious descriptions, in which event the entries are made at varioustimes and the work must be placed upon and removed from the platenrepeatedly before the writing is comleted. Under such conditions, it isobvious that there will necessarily be considerable difficulty attendantupon replacing the work sheet in exactly the same positionlongitudinally of the platen, and that if the work is not positionedexactly in this manner faulty al-inement will result. To satisfy thesetwo classes of requirements, one feature of the invention contem latesthe provision for a longitudinal shi ting of the writing mechanism overthe platen distinct from the ordinary step-by-step line spacing movementgoverned by the feed mechanism. In one aspect this feature of theinvention may be said to consist in means for positioning the writingmechanism for inter-line writing; and in another aspect it may be lookedupon as constituting means for effecting fine longitudinal shifting ofthe writing mechanism relatively to the laten.

A closely allie feature of novelty in the invention is the provision inconnection with As a simple and efficient mode of bringing about theadjustment of the Writing mechanism, I propose to provide means forproducing fine longitudinal shifting of the line spacing racks by meansof which the writing mechanism travels over the platen with its steby-step movement. I also pro ose to mare such means self-retaining, so tat the racks, and therefore, the writing mechanism, will be secured inthe longitudinally shifted position. v r

The line spacing racks form part of the longitudinal track rails uponwhich travel standards carrying the writing 'mechanism; and a furtherfeature of the invention resides in the particular construction of thesetracks whereby proper longitudinal travel of the Writing mechanism isinsured.

In the drawings: Figure 1 is a side elevation of a complete writingmachine embodying the present improvements; Fig. 2 is a view lookingtoward the lIlSKlOOf the feed] mechanism casing; Fig. 5 is a horizontalsection through, the casing; Fig. 6 is a vertical transverse sectionthrough the longitudinal feed mechanism and the underlying track; Fig. 7is a detail of the rigid and loose dog lates; Fig. 8 is a detail bottomplan of the iine finder Fig. 9 is a vertical longitudinal sectionthrough one of the tracks at its pivotal point; Fig. 10 is a sideelevation, partly in section, of the forward part of the track frame andthe adjusting devices; Fig. 11 is a section on the line 11'1-l, Fig. 10;Fig. 12 is a side elevation showing the. rear mounting of a non-tiltabl'e track rail; Fig. 13 is a permechanism, mounted to travellaterally for iettcr spacing by reason of being hung by rollers c fromuides d connecting standards el longitudinally upon the track rails toimpart to the writing n1echanism the required line-spacing movement.Each standard D is provided at its base with peripherally groovedrollers c", which run upon a longituduurl, rounded rib or trackway a proecting upward from rail B and disposed adjacent to and outside of rack12. Each track rail is further provided with an outward extendinghorizontal flan e 2*, against whose under surface work. rol ers fmounted on stub shafts g pro'ecting inward from a depending flange itwhich is formed on the bottom of standard D and projects below trackflange c. It willbe recognized that owing to the standards havingbearing upon both upper and lowersurfaces of the track a much more evenmovement of the standards, and therefore of thewriting mechanism, isinsured than were the standards to travel on the tops of the rails only.

Referring now more particularly to Fig. 8, it will be seen that a linefinder F is slidably mounted upon the lower surface of base plate 76* ofthe writing mechanism The finder has a projecting pin 1* which works inslot m formed in an operating lever n piv' oted at of to plate k Whenlover a is turned in one direction as far as permitted by slot mindicating tip p" at the end of the finder is positioned immediatelybehind the printing point. When the hand of the op erator is removed.from lever n, a spring g returns lever and finder to normal position.

Each standard D is provided Within a casing on the inner face thereofwith a pinion cr" meshing with the corresponding line spacrack c,- andthese pimons are connected by a shaft 5 to which they are rigidlysecured. Within one the casings is a rigid dog plate carrying rigid dogc and mounted for longitudinal reciprocation within the casing; and f isa loose dog plate mounted on the rigid dog plate to move therewith, andalso having an independent movement about shaft 5 the-loose dog beingindicated at The loose and rigid dogs ooo crate with the ratchet wheelF2! rigid with s aft 6 there being a spring k disposed so as normally tomaintain the loose dog in engagementwith wheel 7& and the rigid dog: outof engagement therewith, anda second spring m tending to turn the loosedog plate upward about shaft 6 A lever 71, pivoted within the casing ispr'ovided with a slot p which receives a stud Q3 depending from therigid dog plate and affords means for reciprocatingjthc plates (i and fit being obvious that it is immaterial to the present invention whethersuch actuation be manual or automatic. When the loose and rigiddog'pla'tes are shifted to carry the loose dog out of engagement withwheel a and the rigid dog into engagement therewith, the ratchet wheelis practically unaffected, While the loose dog plate and loose pawl,under the actuation of spring m move upward past a cer tain number ofteeth on the ratchet wheel, the exact number of teeth so passed over being determined by a spacing regulator 1* pivoted above loose dog plate fand having detaining faces 5 and The face 8 is disposed to engage withplate f when regulator 1* is in its lowest position, to stop the plateafter the loose dog has moved upward a distance corresponding to asingle line space. When the spacing regulator is lifted a certaindistance, face t is in position to arrest plate f after the latter hasmoved twice as far as before, whereby double spacing is provided for;and in like manner other forms of spacing may be secured. Loosedog 9having been moved up a certain distance about the eriphery of the wheelthe parts are now alowed to return to normal position, the rigir'l dogpassing out from the ratchet teeth, and the loose dog passing intoengagement thereitli, 'but higher up than normally. A driving spring oconnected at one end to pinion a, and at the other to a pinion of looseon shaft 1) now turns the pinions a a distance corresponding to thenumber of ratchet teeth 'over which the loose dog passed in its idlemovement, and the turning of ratchet Wheel 71 returns the loose dog tonormal or lowest position, where it locks th s parts against furthermovement. A lantern wheel a may be provided for rotating pinion w" toregulate the tension of the driving spring, the lantern -wheel andpinion being designed to be selflooking so as to secure the springagainst un- Winding except by reason of the longitudinal travelof theWriting mechanism.

The feed mechanism just described forms the subject-matter of myco-pending application for patent,-Serial No. 104,842, filedApril26,1902, and patented July 17, 1906, as No. 826,483, of whichthe'present application is a division; and -it is, therefore, notnowclaimed specifically. I It will be recognized that this form of feed ingmechanism is but one of a large number of feed mechanism providing formanual or spring-actuated movement of the writing mechanism over theplaten, any one of which might be employed in connection with thepresent improvements. v

Referring now more particularly to Figs. 1, 2, and 9-11, at the front oftable A is disposed a transverse plate eand at the rear is another platef. Upon these plates rest the track rails B. The latter, in Figs. 1, 2and to the rear of their longitudinal centers-.by

this means providing for a counterbalancing of the track frame by thetraveling ma chine-with hinge members 9 to which they are slidablysecured by enlarged headed pins h projecting downward from the lowerfaces of the rails and occupying longitudina slots 11 formed in thehinge members. Each hinge member 9 is pivoted at 7c to a complementaryhinge member 1 secured to the plate f, whereby tilting of the trackrails is provided for. At their front ends, the tracks are furnishedwith a depending flange member m, which slides upon plate e andmaintains the tracks in a horizontal lane, The plate e has formed at itsforwar edge an upstanding flange n, through which is threaded alongitudinal adjusting screw 0, having a milled operating head p. At itsrear end, thescrew 0 is not threaded, but is provided with a -cireumferential groove g; and this end is swiveled within an adjustingblock 1", by means of a pin 8 which is mounted in the adjusting blockand which takes into the groove q.'

Said adjusting block is slidably mounted on plate e, and is providedwith a transversely dis osed neck sf, the distancetbetween whose W ls,except at the top, is just equal to the thickness of the flan e member mof the track rails. At the top, the walls of-the neck flare outward andupward, so as to form beveled or inclined guiding faces t. Neck 8 of theadjusting block is designed to receive a downmounted ontheir support.

ward opening slot it formed in flange memberm, so that when the trackrails are. in normal position they, and the writing mechane ism, may beshifted back and forth by means of the adjusting screw 0, the slottedconnection of the tracks with the hinge members 9 permitting suchsliding or adjusting. ovement. A screw 6 on the adjusting blockcooperates with a slot 0; in plate e. It will be understood, of course,that any suitable form of adjusting device may be used in connectionwith the track rails without affecting the fundamental conceptionunderlying this invention.

While, of course, it is not essential that the track rails shall betiltable, yet I regard it as one of the subordinate features of noveltyof the present invention to provide tracks which are both slidably andtiltably But, in order to prevent the tracks, when raised, from slidingrearward, it becomes necessary to provide locking means for the railsoperative-when the latter are swung u out of engagement with theadjusting bloc r. In Fig. 9, more especially, 1 have. illustrated oneform of such lockin ;means. Accordin to this constructlon, teunder-surfaee- 0 each track,

adjacent its hinge member g, is cut away so asto, form adownwardopeningchamber 1;, hfifiifhwh is; pivoted a-paw w. whose: workingtipqsdesignedrto engage with the teeth or? a;

racks; formedwonthe top: ofthe hinge membet; 9. Said racle and pawl arearranged. to.-

qfik he traek. against i'earward= movement, and! .1.1 the shapeof astud'y depend;

position.

ing from the awl intermediate its pivot and tlp, 1s provi d forautomatically removing the pawl from engagement with .the rack when thetracks are swung downward into normal position. As. will be readilyunder-- stood, this stud y is of sufficient length to contact with platef before the tracks are all the way down, thereby holding the pawlagainst further downward movement, while the rack continues to movedownward till it is freed from the pawh Gravity may be depended upon tocause the automatic engagement of whose inclined guiding faces 25 directthe' flange member m of the tracks into the neck 3 whereby the tracksare returned to exactly the same position that they occupied beforetilting. It will now be-seen that operating screw 0 and its relatedparts constitute one embodiment of means for effecting longitudinalshifting of the trackv rails, and therefore of the writing mechanism,back or forth to any point within a certain range, this range beingdetermined by the length of the slot at, though it will be apparent thatit might be determined by the length of the threaded portion of theoperating screw.-

Further, it will be seen that this longitudinal adjustment of thewriting'mechanism may be performed either at the outset of writing,

to adjust thepositions of the lines of writing to the spaces in apieceof work, or at-any one of the points of rest governed by the feedmechanism, for the purpose-of permitting. interlineations. Both of theseresults I regard as broadly new achievements in the art.

From still anotherpoint of View, the partsnear thepivotal points of thetrack rails may be regarded as means for permitting the longitudinaladjustment of the-writing mechanism, while the adjusting screw serves toretain the writing mechanism in any adjusted Or the screw and itscorrelated parts. may be looked upon as constituting means for bothadjusting and retaining thetrack rails. It may also be proper, beforepassing on to the claims, to point out that the cooperation, of the linefinder F withthc adjustable track rails is a. very important one,

since the finder moves-With the writing mach-e anism, as the latter is:shifted by the movement of the rails, and, when progectedfor ward to.theprinting point, indicates teth'e operator when operating; screw 0 hasbeen i turned to the proper degree. I

'takes the place of platef described in connection with the tiltablemounting for the tracks. It ill be apparent that locking pawl w and rackare notpresent in this construction and that the same form of 'ad usting device may be employed as formeriy.

What is claimed as new is:

1. In a typewriter, the combination with flatlaten, an overlyingtraveling writingniec ianism, track-rails upon which thewriting-mechanism is supported, and feed-mechanism for imparting to thewriting-mechanism a longitudinal step-by-step line-spacing movement ofthe writing-mechanism on said track-rails relative to the underlyingplaten, of manually operated screw controlled means acting directly onthe rails to effect minute movement thereof in either directionlongitudinally of the platen and for a distance less than the regularline-spaces. 4 a 2. In a typewriter, the combination with a flat-platen,track-rails arranged adjacent the platen, a traveling writing-mechanismsupported on said track-rails and arranged to travel over the platenlaterally and longitu dinally, and feed-mechanisms for impartin to thewriting mechanism a longitudina step-by-step movement ofthe-writing-mech anism on said track-railsfor line spacing, ofmanually-operated screw-controlled means acting directly on the rails toeffect minute movement thereof in either direction longitudinally of theplaten and for a distance less than the regular line-s aces.

3. In a typewriter, t e combination with a flat-platen, track-railsarranged adjacent the platen, a traveling writing-mechanism supported onsaid track-rails and arranged to travel over the platen laterallyandlongitudinally, and feed-mechanism for imparting to thewriting--mechanism a longitudinal step by-step movement of the writing-mecanism' on said track-rails for line-spacing, of manuallyroperatedscrew-controlled means acting directly on the rails toeffect minutemovement thereof in either direction longitudinally of the laten and fora distance less than the regu ar line sp'aces, and means for retainingsaid rails 'in such shifted position. 1

4. In a' typewriter,the combination with a flat-platen, track-railmembers arranged adjacent thereto, and a traveling writing-mechanism suported'by said track-rail members and over ing the platen, of means forefiecting full ine-spacing of the writing-mechanism over the platen,manuall operated screwecontrolld means acting irec'tly .on 7

the rails at the front to effect minute longitudinal movement thereofand of the writingmechanism in either direction relative to the platenand for less than the regular linespaces and for interline-writing.

5. In a typewriter, the combination with a flat-platen, track-railmembers arranged ad- -overlying the platen, of means fo effecting fullline-s aeing of the writing-mechanism over the p aten, a manually-oerated screwcontrolle device acting direct y on the. railmembers forpositioning said rail-members, with the writingmechanism for interlinewriting in either direction relative to the platen, and means formaintaining the rail of the writing-mechanism on said trackrails, of amanually operated screw controlled interline-shifting device actingdirectly on the rail-members'and operative at feed-mechanism forshifting said rail-memplaten and intermediate of the regular linespacesin either direction. A i I 7. In a typewriten the combination with afiat platen, an overlying writing mechanism, and feed mechanism forpositioning the writing mechanism over the platen for imprintingsuccessive lines of writing, of manually-operated screw-controlledinterline-shifting means for imparting to said writing mechanism a finelongitudinal shifting in either direction relative to the platen anddistinct from the line spacing movement.

8. In a typewriter, the combination witha flat platen, an overlyingwriting mechanism, and feed mechanism for positioning-the writingmechanism over the platen for imprinting successive lines of Writing, ofmanuallyoperated screw-controlled interline-shiftmg means distinct fromsaid feed mechanism for imparting longitudinal adjustment to saidwriting mechanism in either direction relative to the platen.

9. In a typewriter, V fiat platen, an overlying writing mechanism, andfeed mechanism-for positioning the wr1tsuccessive lines of writing, ofmanna y-operated screw controlled interline shifting means distinct fromsaid feed mechanism for eiiecting longitudinal adjustment of saidwriting mechanism in either direction relajacent thereto, and atraveling writing-mech anism supported by said rail-members and membersand writing mechanism. against mechanism for effecting regularline-spacing bers and writing mechanism relative to the tive to theplaten and for retaining the same the, several points of rest governedby said i the combination with a ing mechanism over the platen for imrinting position against longitudinal ing, of manually-operatedscrew-controlled interline shiftin means operable the successive pointsOI rest governed by said feedmechanism for effecting longitudinalshifting of the writing mechanism in either direction relative to theplaten.

11. In a typewriter, the combination with a flat platen, an overlyingwriting mechanism, and feed mechanism for-imparting to said writingmechanism a longitudinal stepby step line spacing movement over theplaten, of manually-operated screw-controlled interline-shifting meansoperable at the several points of rest in such longitudinal movement foreffecting fine longitudinal back or forth adjustment of the writingmechanism relative to the platen.

- 12. In a typewriter, the combination with a flat platen, an overlyingwriting mechanism, and feed mechanism for positioning the writingmechanism over the platen for imprinting successive lines of writing, ofselfretaining manually operated screw --controlled interline-shiftingmeans distinct from the feed mechanism for effecting longitudinaladjustment of the writing mechanism in either direction relative to theplaten.

13. In a typewriter, the combination with a flat-platen, andline-spacing racks adjacent to, and manually-controlled screw-operatedlongitudinally-adjustable in either dlrection with reference to, saidplaten.

14. ,In a typewriter, the combination with a flat platen, of linespacing racks, and handcontrolled screw means for effecting longitudinalshifting of said racks in either direction relative to the platen. '15.In a typewriter, the combination with a fiat platen, of line spacingracks, manuallyoperated, screw-controlled means for effectinglongitudinal adjustment of said racks in either direction relative tothe platen, and means. for retaining the racks in shifted position.

16. In a typewriter, the combination with a fiat platen, of line spacingracks, and self-retaining manually-operated, screw-controlled ,means foreffecting fine longitudinal shifting of said racks incither directionrelative to the platen.

17. In a typewriter, the combination with a flat-platen and a support,of line-spacing racks disposed at the edges of said platen, tiltableaway from the same, and slidablymounted on said su port andminutely-adjustable longitudina ly and independent of Sfil'il platen.

18. In a typewriter, a support, tiltable line-spacin racks, andscrew-operated means for minute y-adjusting said racks longitudinally ofthe support.

' 19. In a flat platen typewriter, the combination of a support, a flatplaten, track rails mounted tiltably and longitudinally slidably on saidsupport, minute y-operating means for slidably-shifting said rails, andmeans for securing said rails at the desired longitudinal position.

20. In a typewriter, a support, line spacing racks tiltable thereon, andminutely-adjusting, screw-operated means for effecting longitudinaladjustment of said racks.

21. In a typewriter, a support, line spacing racks tiltable thereon,minutely-ad usting, screw-operated means for permittin fine longitudinalshifting of said racks, an

means for securing the same in shifted posi tion.

22. In a fiat laten typewriter, a support, line spacing raclis, meansfor connecting said racks tiltably to the support, andminutelysh-ifting, finger-operated means for effecting longitudinaladjustment of said racks and for securing the same at the desired degreeof adjustment.

23. In a flat platen typewriter, longitudinal line spacing racks, meansfor permitting tilting thereof, means for effecting fine longitudinaladjustment of the racks, and means operative when the racks are raisedto lock t e same against rearward movement.

24. Ina fiat platen typewriter, tiltable and longitudinally slidable hnespacing racks, means for effecting fine longitudinal shifting thereof,and means 0 erative when the racks are raised to lock t 1e sameautomatically against rearward sliding.

25. In a flat laten typewriter, tiltable and longitudina 1y slidableline spacing racks, self-retaining means for effecting fine longitudinalshifting thereof, and means o erative when the racks are raised to lockt e same automatically against rearward sliding.

26. In a flat platen typewriter, tiltable line I spacing racks, meansfor permittingfine longitudinal shifting thereof, means for securing theracks against longitudinal shifting when in normal position, and means 0erative when the racks are raised to 100K the same automatically againstrearward shiitspacing racks, means for permitting fine longitudinalshifting thereof, means operative when theraclis are raised to lock thesame automatically against material rearward movement, and meansoperative when the racks are returned to normal positi n to V exactlyre-position the same.

28. In a flat platen typewriter, tiltable and longitudinally slidableline spacing racks, means for effecting fine longitudinal shiftingthereof, means operative when the racks are raised to lock the sameautomatically against material rearward movement, and a guide disposed.to automatically return the racks to exact position when lowered.

29. In a fiat platen typewriter, tiltable line spacing racks, means forpermitting fine longitudinal shifting thereof, means for securing theracks in shifted horizontal position, means 0 erative when the racks areraised to lock the same automatically against material rearwardmovement, and means operative upon lowering of the racks toautomatically return the same to exact position.

30. he fiatlatentypewriter, thecombination of aat-platen,horizontally-disposed longitudinal line-spacing racks slidableorizontally in the direction of their length, and amanually-operatedscrew-controlled device arranged at the forward part of said racks androtatable to effect minute, fractional movement of said rackslongitudinal in either direction relative to the platen.

31. In a llat- .laten typewriter, the combination of a at-platen,horizontally-dis posed longitudinal line-spacing racks slidableiorizontally in the direction of their length, and a manually-operatedscrew-controlled device arranged at the forward part of but independentof said racks and rotatable to eli'ect minute, fractional movement ofsaid racks longitudinal in either direction relative to the laten.

32. n a fist laten typewriter, a support,

r line-spacing rac (s tiltable and longitudinally slidablc horizontallythereon, and a manually-operated screw-device mounted on the support andengaging the racks to shift them horizontally and for distancesfractionalof regular line-spaces for interline-writing.

In a flat platen typewriter, a support,

spaced plates thereon, line s acing racks tiltably and longitudinally sidahly eonnected to one of said plates and resting slid ably upon theother late, and an ad 'usting screw mounted on t re last ,named plate tocooperate with the racks. i

34. In a flat platen typewriter, a support,

line spacing rac rs tiltable and longitudinally slidahle thereon andprovided at their for ward ends, with a depending flange, and anadjusting screw device mounted on the support in engagement with saidflange.

35. In a fiat platen typewriter, tiltable hinge members, andlongitudinal line spacing racks scoured thereto for u )Ward-tilting andfor sliding in the direction their length.

36. In a flat platen typewriter, a support, a platen mounted thereon,hinge members tiltahly connected thereto, and, tiltable longitudinalline spacing racks secured to said hinge members for adjustment in thedirection of their length when in their normal position.

37. In a flat platen typewriter, tiltahle.

aeasee hinge members provided with slots formed longitudinally therein.longitudinal line spacing racks mounted thereon, and enlarge'zh headedfastening devices lot into said racks and working in said slots.

38. In a typewriter, a flat platen, tiltable hinge members, longitudinallino spacing racks tiltahle with and slidable on said hinge members, andlongitudinally disposed locking racks and pawls interposed between theracks and hinge memhersto prevent rearward movement of the line spacingracks when tilted.

39. In a typewritena flat platen, tiltahle hinge members, longitudinabein arranged to engage automatically with the rack upon elevation ofthe frame, and

means for automatically removing the pawl from engagement with the rackupon depression of the track frame to normal position.

41 In a flat platen typewriter, tiltable line spacing racks connected tomore 'iugather, a tiltahle hinge member uponvrhirh said racks aremounted, a lon retinal lovi-1- ing rack disposed upon the top of said 1member, a )ivoted pawl mounted en ti spacing raclas and nlatically withthe locking reel: l of the line spacing racks, and r eans figrnaticalltdisengaging the pawl on'denres" sion of the racks to normalpositi n.

42. In a flat platen typewriten, tiltahle line spacing racks connectedto move to gether, a tiltahle hinge member n on which. said. racks aremounted, lpngitn" i'nal looking rack disposed upon the lop of said hingemember, a pivoted pawl connected.

BU line spacing racks and. arranger. to engage automat cally with thelockin re k tilting of the spacing recite,

pending from said pearl and disposed to ing rack formed on said hingemember, a pawl pivotally connected to the spacing ranks, a springdisposed to cause eeteinatic arranged to engage wa the engagement of thepawl with the locking i supported at their rear, and constructed to rackupon tilting of the spacing racks, and means for automaticallydisengaging the pawl upon depression of the spacing racks to normalposition.

44. In a flat platen typewriter, tiltable .hinge members havinglongitudinal locking racks disposed on their upper surfaces, longi'tudinal hne spacing racks mounted on said hinge members to tilttherewith and having downward opening internal chambers, longitudinalslotted connection between-the 5 acing racks and hinge 'members, and looing pawls mounted in said chambers.

45. In a ty ewriter, hinged traclerails constructed to be adjustedhorizontally and, also, to be tilted vertically, a carriage movablelongitudinally on said track rails, means for adjusting said track railsand their sup ported carriage horizontally, said rails being ingedintermediate their length to present sections extending to the front andrear of the hinge operated w en the carriage is disposed to one sideofithe hinge point, and means for locking the said carriage and railsagainst shifting in the direction of adjustment while said rails arebeing tilted vertically.

46. In a typewriter, track rails movable vertically and horizontally, acarriage, movable longitudinally thereon, means l'or adjusting rails andcarriage horizontally, and means for efiecting locking of said rails intheir adjusted position while said rails are being moved vertically.

47. In a typewriter, track rails movable vertically and horizontally, acarriage movable longitudinally thereon, means for adjusting rails andcarriage horizontally, means for effecting automatic'locking of saidrailsin their adjusted position while said rails are being movedvertically.

48. In a typewriter, a flat platen, hinged, tiltable track rails, acarriage movable longitudinally thereon for line spacing, spacingmechanism carried by the carriage, and a key-operated line findercarried by and traveling with the carriage.

49. In a typewriter, a fiat platen, hinged, tiltable track rails, acarriage movable longitudinally thereon for line spacing, spacingmechanism carried by the carriage, and a key-operated line findernormally retracted from the rinting point and constructvi'd tp'beprojecte thereto.

50. In a typewriter, the combination with track rails, a carriageconstructed to traverse said rails for lines acing and hinges upon whichsaid track rai s are movably' supported at their rear, of means forautomaticall locking the rails to the hinges when said rai s are tilted.

51. In a typewriter, tiltable track rails, a longitudinal travelingcarriage supported onthe rails, ingesupon which said rails are ploint,whereby. said rails will be permit horizontal sliding of the railsthereon, and an automatically operating locking device constructed tolock the rails to the hinges when said rails are tilted,'and constructedto be automatically unlocked when said-rails are returned ,to theirnormal horizontal position.

52. In a ty ewriter, the combination with movable trac l rails, and alongitudinally traveling carriage disposed thereon, of means forsupporting the forward end of' the track rails and constructed to guidethe name into operative position, and an adjusting screw for moving thetrack rails longitudinally.

53. In a typewriter, the combination with a flat platen and an overlyingwriting mechanism, and with feed mechanism for imparting to one'of saidmembers a longitudinal step-by-step line spacing movement relative tothe other, of minutely-shifting, screw-operated means for effectinglongitudinal adjustment of said member, and a line finder carried by thewriting mechanism to indicate the proper degree of adjustment.

54. In a typewriter, the combination with a fiat platen, an overlyingwriting mechanism, and feed mechanism for positioning the writingmechanism over the platen for im printing successive lines of writing,of minutely-shifting, screw-operated means for in:

arting to said writing mechanism a fine ongitudinal shifting distinctfrom the line spacing movement, and a line finder carried by the writingmechanism .to indicate the proper degree of shifting.

55. In a typewriter, the combination with a fiat platen, an overlyingwriting mechanism, and feed mechanism for positioning the writingmechanism over the platen for imprinting successive lines of writing, ofminutely-shifting, screw-operated means for imparting to said writingmechanism a fine longitudinal shifting distinct from the line spacing,movement, a line finder carried bytie writing mechanism and normally retracted from the printing point, and means for projecting said finder t0the printing point.

56. In a ty ewriter, the combination with a longitudina 1y travelingcarriage, tiltable and longitudinallymdjustable track rails upon whichsaid carriage travels and comprising a fiat-faced body portion and around-faced rib raised above said flat-face body portion, and rollerscarried by the carriage and arranged to travel upon said rib.

57. In a t pewriter, the combination of a longitudinally travelincarriage, tiltable and longitudinally-adjustafile track rails upon whichsaid carriage travels and comprising a flat-faced body portion and around-faced rib raised above said fiat faced body-portion, rollerscarried by the carriage and provided with a peripheral grooveconstructed to engage the rib and steady the carriage during its travel.

58. In a typewriter, the combination of a longitudinally travelingcarriage, track rails I upon which said carriage travels and comprisingan upper flat-faced body portion, a

59. In a typewriter, a longitudinally traveling carriage, track railsupon which said carriage travels, dog-mechanism carried by the carriage,toothed members connectin with said dog-mechanism, feed racks formed onsaid track rails and with which said toothed members engage,.peripherally grooved rollers carried by said carriage, said track railscomprising a body portion, a rib formed on the upper face thereof andcon-- structed to be engaged by said peripherally ese.

above said upper surface, and a laterally. rejecting flange having acontinuously evel lower surface.

61. In a fiatplaten typewriter, the combination of longitudinal trackrails, and a longitudinally traveling carriage mounted thereon andbearing against both the upper and lower surfaces thereof.

62. In a typewriter, the combination of a fiat platen, of a support, andtrack rails longitudinally slidable on said sup ort.

In testimony whereof, I a it my signature, in the presence of twosubscribing witnesses.

GEORGE W. DONNING.

